I was exploring a fascinating site: Atlanta Time Machine, when I came upon a series for the Imperial Hotel, and the various night club acts it had hosted over the years. what I'm wondering about is the use of the apostrophe in Topless 'A Go-Go? what's being abbreviated here? (besides the clothing...) you'll also see it here: Whisk 'A Go-Go.
just curious.
it's a great site, by the way. an interesting study in "progress", though a lot of the city looks better now, than 50 years ago.

formerly known as etaoin...